Machine for repairing patent leathers



March 12, v M. QKEE}; A

MAHINE FOR REPAIRING PATENT LEATHERS Filed Sept. 22, 1924 2 Sheets-Sheet l March 12, 1929. F. M. FURBER MACHINE FOR REPAIRING PATENT LEATHERS 2 Sheets-Sheet Filed Sept. 22, 1924 w w Z Patented Mar. 12, 1929.

UNITED STATES PATENT OFFICE.

FREDERICK M. FURBER, OF REVERE, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON,

JERSEY.

NEW JERSEY, A CORPORATION OF NEW MACHINE FOR REPAIRING PATENT LEATHERS.

Appl cation filed September 22, 1924. Serial No. 739,120.

This invention relates to machines for use in the manufm-ture of leather articles. The invention is illustrated as embodied in a mach ne designed for repairingimperfections in the linish of articles manufactured of patent or enameled leathers .R machine of this character is disclosed in llnited States Letters Patent No. 1,096,423, antcd May 12. 191 1 on an application of Frederick M. Furber. in which a novel construction is provided for working enamel or other repairing substance into the surface of the leather. The machine disclosed in said Letters Patent comprises a work-rubbing tool arranged to have a mark-rubbing movement in a. closed elliptical path effected by simultaneously rocking the tool about its axis and imparting axial reciprocations to it. This compound movement of the workrubbing m mber highly desirable for the reason that it enables more perfect distribution of he enamel and a nearer approach to the skill oi an etlicient operative than has been otherprovided. .Vhen the machine is being used for treating shoes it is found that, as the operation approaches the sole edge. the trans erse movement of the work-rubbing nn-mbcr. by reason of its axial reciprooations, r. )lllt'lllll(S causes the rubbing" member to viagainst the sole, throwing the shoe away from the tool and preventing the most rtleclivc treatment of this area. This causes the repairing fluid to gather and harden in the crease, and unless care is taken, the adjacr-ot surfaces may be poorly polished. Also, the vibration which is imparted to the Work I. its contact with the sole edge has a tendc. c to be objectionable to the operators beiausc they commonly hold the shoe against their breasts in order to give it proper bearinn upon the work-rubbing member.

Accordingly, an object of this invention is to provide an improved machine by the use of which operations such as patent and enamel leather repairing may be still furthcr facilitated without sacrificing any of the advantages charactirtstic of machines of the type above referred to. This is accomplished in the illustrative embodiment of the invention by an organization having provision for dispensing with the axial reciprocations of the tool-carrying shaft at the will of the operator.

In the illustrated preferred construction,

in accordance with features of the invention. the axial reciprm'ations of the tool shaft are imparted by mechanism comprising an eccentrically mounted roll driven from the drive shaft of the machine and normally disposed between and engaging the flanges of a collar on the tool shaft and provision is made for rendering this mechanism ineffective as by the axial withdrawal of the eccentrically mounted roll to a point where it is no longer effective to reciprocate the tool shaft. Preferably, the flanges of the collar are beveled and the eccentric roll is in the form of a frustum of a cone. This arrangement allows the roll to be withdravm suflicienth to accomplish the desired object without requiring that it be withdrawn beyond the circle of the flanges themselves. thereby ensuring the reentrance of the roll into the space between the flanges regardless of the relative position of the parts, when it is again desired to re ciprocate the tool shaft. the flanged collar being uniformly positioned by a spring and stop ready for this reengagrement.

A more complete description of the invention is found in the following specification taken in connection with the accompanying drawings in which Fig. 1 is a perspective view, with parts broken away. of the head of my improved machine:

Fig. 2 is a side elevation of the same portion of the machine with the cover of the casing removed and parts shown in section;

Fig. 3 is a plan view of the mechanism for imparting axial reciprocation to the tool shaft;

Fig. 4- is a fragmentary view showing these parts in inoperative position;

Fig. 5 is an end elevation. with parts broken away, of the head of the machine; and

Fig. 6 is a longitudinal section through the centers of the drive shaft and the jack shaft.

In the machine shown in the drawings, a round shoe-rubbing tool 10 is mounted upon a. tool shaft 12 supported in a bearing 14 (Figs. 3 and 5) in the casing: 16 of the head of the machine so that it. may be rotated or reciprocated axially. it. cloth cover 18 in the form of an endles strip tensioned by means of a spring-pressed fork 20 is provided for the work-rubbing tool 10 and in the use of the machine a shoe is commonly held against the lower face of the tool 10. A drive shaft 22 of the machine is mounted in suitable bearings in the casing 16 and positioned at right angles to the tool shaft 12 and overlies said tool shaft. Power may be supplied to the drive shaft by means of a pulley 24 adapted to be clutched to the shaft 22 by a clutch disk 26 which is normally held in engagement with the pulley by means of a spring 28 which surrounds the shaft and presses against the hub of a gear 36. This gear is pinned to the drive shaft, and one end of its hub is halved at 32 to provide sliding engagement with a sleeve 34 upon which there is mounted an inclined grooved cam disk 36. (lo-operating with the flanges of this inclined cam disk and arranged to slide the cam disk along the axis of the drive shaft is a part which, for convenience, may be termed an oscillator 40 having arms fitting between the flanges of the grooved disk 36 and a stud 42 rotatively mounted in a cross member 44 which in turn is journaled upon trunnions 46 supported by the casing 16. Whenever the grooved disk 36 is rotated by means of the halved joint 32, it is caused to move back and forth along the drive shaft, and this movement is imparted to a worm 50 formed upon a sleeve surrounding and frictionally engaging the sleeve 34 upon the shaft The worm 50 constitutes a toothed member which is in mesh with a worm gear 52 splined upon the tool shaft 12. Formed integrally with the worm 50 is a spur gear 54 and the worm 50 and the spur gear 54 are maintained in engagement with the hub of the grooved disk 36 by a spring 55 2) seated in a recess formed in a stop collar 58 secured to the sleeve 34 and bearing upon a ball 57 which rests upon a disk 59 resting against the face of the spur gear 54. The spur gear 54 is arranged in toothed engagement with a gear 60 mounted on a stub shaft 62 and prevented normally from rotating by means of a thumb lever 64 which engages a stop 66 upon the casing. So long as the thumb lever 64 is kept in position to engage the stop 66. by a spring plunger (Fig. 6) the friction between the drive shaft 22 and the sleeve on which the worm 50 and the spur gear 54 are formed will not be peri'nitted to turn the worm 50. On the other hand, the worm 50 will be reciprocatcd along its axis by reason of being held in engagement with the oblique grooved cam disk 36, and this axial movement will effect an oscillatory movement of the worm gear 52 on the tool shaft and cause the tool to be rocked through the desired extent of movement. Inasmuch as the cloth cover 18 over the tool 10 becomes soiled rather quickly, provision is made for rotating the tool at the will of the operator in order to bring a. fresh portion of the cover into position for use, and this may be accomplished by depressing the thumb lever 64 and allowing one complete revolution of the gear 60. This will allow several revolutions of the spur gear 54 and the worm 50 and will move the surface of the workrubbing tool along about one inch.

At the same time that the tool shaft 12 is being given a rocking movement by the mechanism above described it may be axially reciprocated by other mechanism to impart the lateral movement, which. when combined with the rocking component already described results in a compound movement of the tool. These two movements may be compounded in various ways so that the resulting path of any operative point on the periphery of the tool is in the form of a circle, an ellipse or an elongated figure eight in contact with the work. The preferred mechanism which herein illustrated is arranged to generate the figure eight movement. To this end the worm gear 52 is splined to the tool shaft 12 and is held against the bearing 14 (Fig. 8) by a spring 70 positioned between the worm gear 52 and the hub of a collar 72. The hub of this collar is recessed to have a sliding connection 74 with the complementally shaped parts of the hub of the worm gear 52 and the collar 72 is pinned to the tool shaft 12. Mounted for engagement between the flanges of the collar 72 is an eccentrically mounted roll 76 carried upon the end of a jack shaft 78 which is parallel to the drive shaft 22 and is supported in suitable bearings in the casing. The jack shaft 78 has a pinion 80 splined thereon. which is positioned in driving engagement. with the gear 30 fixed on the drive shaft 22. The rotation of the gear 30 with the drive shaft will therefore be communicated to the cccentrically mounted roll 76 which, in turn, will impart axial reciprocations to the tool shaft 12 without disturbing the operative engagement of the toothed worm 50 and the gear 52. In order that such rcciprocations may be discontinued at the will of the operator. means are provided for rendering the roll 76 ineffective by disconnecting the roll 76 from the collar 72. said means comprising a flanged collar 82 secured to the end of the jack shaft 78. An operator-controlled bell crank lever 84 carr ving a roll 86, which engages between the flanges of the collar 82, is arranged to be operated by a treadlc 87 so that the operator may cause the withdrawal of the eccentrically mounted roll 76 to inoperative position whenever it is desired. The eccentricially mounted roll 76 is normally maintained in engagement by a spring 88 connected to one arm of the bell crank lever and the casing of the machine, and this spring 88 holds the lever 84 against a stop (Fig. 2) adjustably positioned in a removable side plate 16 forming part of the casing. This stop 85 thereby will determine the correct operating position of the roll 76 within the flanges of the collar 72. The eccentrically mounted roll 76 is secured to the jack shaft 78 by means of a headlltl ed rod 90 passing through the jack shaft and secured by means of a nut 92 at the exposed end thereof. Attention is called to the fact that the flanges of the collar 72 are beveled to coact with the conical shape of the roll 76, and, as is shown in Fig. l. when the roll has been withdrawn to the full extent .reqnired for ctl'ective operation, its end still lies hetwecn the circles of the peripheries ll) of the flanges of the collar 72 without engaging them as it rotates. An adjustahle stop 71 is provided in the side plate 16 against which the end of the tool shaft 12 carrying the collar 72 is thrown by the spring" 70. upon the Withdrawal of the roll 76. so as to determine the endwise limiting position of the shaft and assist in the ready reengagement of the roll 76. hen the treadle-operated lever 84 is released. the roll 76 will he sure to enter 20 the space between and to reengagre the flanges of the collar 72 (properly positioned by the stop 71) so that it will. again reciprocate the tool shaft axially. From Figs. 1 and 2 it will he seen that there is provided on the front of the machine head a thnmh screw 94 which is held from dropping out of the machine hy a lug 96 and is arranged to hear against the end of the drive shaft 22 to compress the spring 2 and disconnect the clutch 26 from the pulley 24 when the operator Wishes to stop the machine.

It is preferred to arrange the gear 30 with twice as many teeth as the pinion 80. The jack shaft 78 will then revolve at twice the speed of the drive shaft, and since each revolution of the latter is accompanied by one complete axial reciprocation of the worm 5t) and consequently one complete rotative oscillation of the tool shaft 12. it follows that for every rotative oscillation of the tool shaft, two axial reciprocations thereof will occur. Thus it will he seen that the path of the tool is made up of two conn 'mnents at right angles to one another, the frequency of reciprocation of one component heing twice as great the frequency of the other component.

In order to obtain a properly shaped fig:- ure eight, it is necessary that, when one omponent is at an end of its stroke. the other component whose frequency is twi e as great shall be at the middle of its stroke. lt i:- therefore necessary to set the drive shaft 22 and the jack shaft 78 in such angular rela tionship that, when the worm is at one. limit of its horizontal movement, the eccentric roll will he midway between the limits of its horizontal movement. To aid in aasemhling the machine with the shafts and 78 set in proper relation, a disk 98 linea lrcside the gear 30 and is provided with a projection (not shown) arranged so that, unless the drive shaft and jack shaft are set in correct angular relationship. it will strike the hub of the pinion 8t) and prev nt con tinued rotation of the drive shaft. A depression in the said huh, however, permits this projection to revolve without obstruction when the drive shaft and jack shaft are correctly set.

in the use of the machine. after the operator has applied a hle quantity of repairing fluid, the shoe will he held against the ruhhin; tool 10 to which there is imparted in thc particular machine illustrated a motion such that an} peration portion of the tool has .1 path of movement rcsemhliin? an elon 'ateal tia'ure eight n contact with the work. which coin ines a routing movement and an axial reciprocation of the tool shaft. i in the course of the worl: he lateral movement of the tool hecon s nnnecess y or untiles rehle. it is oulv necessary for the operator depress the treadle (not shown) attached to re hell 0 anl; lever 8i. whereupon the tool ll he rocked in ii sine' e plane. In order to ieic the cloth cove to provide a clean worlqinsr position thereon. the operator may depress the thumb piece 64 to allow. o at on ot' the {rear o and the iti tt-tlliltfll' partial rotation of the tool ltl. The machine may it" completely stopped by screwingin the llilll!l) screw 94:.

Having described the invent on. whati claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for repairing patent leather shoes. the comhinition of a. shaft. a tool shaft. a jacl: shaft driven fl'til). iit drive shaft. a .vorloruhhine' tool. an operating portion of the periphery of which is arranged to have a compound movement in a closed path in rnhhine contact with a piece of Work. means includinga toothed sleeve 't'rict'ionally nnmnt d on said d ive shaft for oscillat ng said tool ahout its axis to produce one component of said C llilpfilllltl ruhhintg' movement. releasable girar nieshine with said toothed sleeve and permitting a progressive rotative movement of the tool at the will of the operator. means including a. collar on said tool shaft provided with licvc czl d ive tlane es and an eecentr callv mounted roll at.-

the end of said driven jack shaft for simnltaneonsly reciprocating said tool axially to produce another component of its compound rnhhinp; movement. and means for moving); said jack sha t't endwise to withdraw said roll thereby to render the tool-reciprocating: means ineffective to impart axial recinrocations to the tool at the will of the oi erator without interrupting the oscillations of the tool about its axis.

.2. In machine for repairing patent leather shoes. the comhination of a round wor -ruhhingg tool hating, an operating point,

cry. means for oscillating said nnltaneonsly axis. means for reiiiproeatingr said tool axially. to move the opera ine point in closed path in contact with the Work, releasable means permitting lltl a progressive rotative movement of the tool at the will of the operator, and means for disconnecting the means for imparting axial reciprocations at the will of the operator.

2). In a machine for repairing patent leather shoes. the combination of a shoe rubbing tool, a shaft supporting said tool, a gear on said shaft. means including a toothed member co-operating with said gear to oscillate said shaft about its axis, means to reciprocate said shaft axially, without disturbng the operating engagen'ient of said toothed member and said gear, and means to disconnect said means for in'iparting axial reciprocations at the will of the operator.

-l. In a machine for repairing patent leather shoes, the combination of a tool, a haft supporting said tool, a rotary drive shaft, a worm supported on said drive shaft but arranged to be normally held against rotation tllGlOWltl'l, a worm gear mounted on said tool shaft and arranged to mesh with said worm, means operated by the rotary movement of said drive shaft axiallx to reciprocate said worm thereby to oscillate said tool shaft about its axis. a flanged collar on aid tool shaft, a stop to determine one limiting. endwise position of the tool shaft. :1 spring urging said shaft with its collar against the stop. rotatable means adapted to engage the flanges of said collar and operated bv the rotar motion of said drive shaft to reciprocate said tool shaft axially against the action of said spring. and operator controlled means for removing said rotatable means from engagement with the flanged collar constructed and arranged to allow the immediate reengagement of the rotatable means and the collar.

In a machine for repairing patent leather shoes. the combination of a shoe rubbing tool, a shaft supporting said tool, a gear mounted on said shaft arranged to impart angular shoe rubbing movements to said tool and shaft while allowing axial reciprocations of the shaft with respect to the gear, a drive shaft at right angles to the tool shaft, means on the drive shaft for imparting angular movements to the gear to turn the tool shaft, a grooved collar on said tool shaft having flanges, a jack shaft parallel to the drive shaft and geared thereto, an eccentrieally mounted roll at the end of the jack aha ft engaging the thing s of said collar and arranged to impart axial reciprocations in opposed directions to th, tool shaft \vhieh combine with the angular mowments to produce compound work rubbing movements, means for Withdrawing said roll from engagement with said eollaixv and. means for positioning said flanged collar endwise in a predetermined location when it no longer reciprocated by the roll thereby to facilitate re-engagement of the roll between the flanges of the collar.

6. In a machine of the class described, the combination of a tool, a shaft supporting said tool, a gear mounted on said shaft arranged to impart turning movement thereto while allowing axial reeiprocations of the shaft with respect to the gear. means for imparting rotative movements to the gear to turn the shaft, a collar on said shaft provided with beveled flanges. and an eccen trieall mounted, driven. frusto-conical roll adapted to engage the thmges of said collar and impart axial reciprocations to said tool shaft.

'1'. In a machine of the class described, the combination of a tool. a shaft supporting said tool. a gear mounted on said shaft arranged to impart turning movement thereto while allowing axial reeiproeatioi'i of the shaft with respect to the gear. means for imparting rotat ve movements to the gear to turn the shaft, a collar on said shaft. provided with beveled flanges, an eecentricallv mounted, driven. frusto-conical roll adapted to engage the flanges of said collar and impart axial reeiprocations to said tool shaft. and means for withdrawing said frusto-ronieal roll from the flanges to :1 point where, in its ro-' tation, it will no longer contact with the flanges but in which the end of the roll still lies within the circle of the flanges.

In testimony whereof I have si ned my name to this specification.

FREDERICK M. FURBER. 

